用于反馈地震计的新一代机械摆

New mechanical pendulum for feedback seismometer

为短周期反馈地震计而研制的新一代机械摆,创新性采用一缸双隙的磁系结构,线圈间较小的变压器效应为施加深度负反馈获取更优的技术性能创造条件,且该机械摆在寄生共振频率、抗零漂、动态范围和非线性失真等方面具有较大改善。

New mechanical pendulum for short period feedback seismometer is introduced in the paper. It innovatively uses magnetic system with two-gap between the mass and the frame; lesser transformer effect between coils creates the conditions which will allow using deep negative feedback for higher technology index. The performances of new mechanical pendulum, such as parasitic resonance frequency, anti-zero drift, dynamic range and nonlinear distortion, show larger improvement over previous mechanical pendulum.